Cross section of a root: axis of
the plant which grows in the opposite direction from the stem, maintain
the plant in place and absorbs nutrients.Piliferous stratum: set of cells on the outer layer that carry
the root hairs.Cortex: part of the root that protects the pith.Xylem: woody parts of the root.Phloem: vessels through which sap circulates.Pith: central part of the root.Phellogen: part of the root that produces cork.